*{margin: 0;padding:0;}
.video{
    width:1226px;
    height:330px;
    margin-left: auto;
    margin-right: auto;
    background-color: #F5F5F5;
    position: relative;
    top:30px;
}

.video-top{
    width:100%;
    height: 50px;
    line-height: 50px;
    position: absolute;
}

.top1{
    position: absolute;
    left:0;
    font-size: 25px;
}
.top2{
    position: absolute;
    right:0;
    font-size: 17px;
}

.video-center{
    width:1226px;
    height: 320px;
    overflow: hidden;
    margin-top: 50px;
    text-align: center;
}

.video-center div:not(:last-child){
    float:left;
    width:297px;
    height: 270px;
    top:50px;
    position: relative;
    margin-right: 9.5px;
    background-color: white;
}
   

.video-four{
    float:right;
    width:297px;
    height: 270px;
    top:50px;
    right:0;
    position: absolute;
    background-color: white;
}
    

.three1{
    position: relative;
    top:20px;
}
.three2{
    position:relative; 
    color:gray;
    font-size: 12px;
    top:40px;
}
